Adapter

Abstract

The adapter comprises a first transmission pipe, a second transmission pipe, a first sealing joint, a second sealing joint and a locking piece, and the first transmission pipe is arranged in a hollow mode in the axial direction; the second transmission pipe sleeves the periphery of the first transmission pipe, and a vacuum cavity is formed between the second transmission pipe and the first transmission pipe; the first sealing joint is connected with the first end of the first transmission pipe and the first end of the second transmission pipe at the same time so as to seal one end of the vacuum cavity, and the first sealing joint is hollow and communicates with the interior of the first transmission pipe; the second sealing joint is connected with the second end of the first transmission pipe and the second end of the second transmission pipe so as to seal the other end of the vacuum cavity, and the second sealing joint is hollow and is communicated with the first transmission pipe; the locking piece is arranged on the second conveying pipe in a sleeving mode and used for locking the equipment connector of the Dewar flask and the first sealing connector. In this way, the cooling capacity loss in the transmission process of the Dewar flask and the infusion tube can be reduced.

Description

Technical Field

[0001] This application relates to the field of cryogenic engineering technology, and in particular to an adapter. Background Technology

[0002] In laboratory or industrial environments, Dewar flasks are commonly used to store cryogenic liquids such as liquid oxygen and liquid nitrogen. However, in practical applications, the outlet diameter of the Dewar flask often does not match the inlet diameter of the delivery tubing, making direct connection impossible. An adapter is typically required to accommodate these two different diameter pipes. During its long-term research and development process, the applicant of this application discovered that adapters suffer from significant cold loss of cryogenic liquids during transmission. Utility Model Content

[0003] The main technical problem addressed by this application is to provide an adapter that can reduce cold loss during the transfer of the Dewar bottle and the infusion tubing.

[0004] To solve the above-mentioned technical problems, this application adopts the following technical solution: An adapter is provided, comprising: a first transmission tube, hollow along the axial direction; a second transmission tube, sleeved around the first transmission tube and forming a vacuum cavity between the two; a first sealing joint, connected to both the first end of the first transmission tube and the first end of the second transmission tube to seal one end of the vacuum cavity, the first sealing joint being hollow and communicating with the interior of the first transmission tube, and used for insertion into the device interface of a Dewar flask; a second sealing joint, connected to both the second end of the first transmission tube and the second end of the second transmission tube to seal the other end of the vacuum cavity, the second sealing joint being hollow and communicating with the first transmission tube, wherein the second sealing joint is used for communication with an infusion tube; and a locking member, sleeved on the second transmission tube, used to lock the device interface of the Dewar flask and the first sealing joint when the first sealing joint is inserted into the device interface of the Dewar flask.

[0005] The adapter further includes a pad, which is connected to the first sealing connector. The pad is conical, and the device interface has a first conical surface inside. When the first sealing connector is inserted into the device interface of the Dewar flask, the outer circumferential surface of the pad is sealed to the first conical surface as the locking member is tightened.

[0006] The inner wall of the first transmission tube is provided with a second conical surface. When the infusion tube is inserted into the first transmission tube through the second sealing joint, the end of the infusion tube is sealed and connected to the second conical surface.

[0007] The second transmission tube includes a first seamless steel pipe, a third sealing joint, a first reducer, and a second seamless steel pipe that are coaxially arranged and connected in sequence. The diameter of the end of the first reducer connected to the third sealing joint is smaller than the diameter of the end of the first reducer connected to the second seamless steel pipe. The outer circumferential surface of the third sealing joint is provided with a groove surrounding the third sealing joint, and a sealing ring is provided in the groove. The locking member is sleeved around the third sealing joint. When the first sealing joint is inserted into the device interface of the Dewar flask, the device interface of the Dewar flask is inserted between the third sealing joint and the locking member.

[0008] The first transmission pipe includes a third seamless steel pipe, a second reducer, and a fourth seamless steel pipe coaxially arranged and connected in sequence. The diameter of the end of the second reducer connected to the third seamless steel pipe is smaller than the diameter of the end of the second reducer connected to the fourth seamless steel pipe. The third seamless steel pipe extends from the first seamless steel pipe into the second seamless steel pipe. The second reducer is disposed in the second seamless steel pipe. The fourth seamless steel pipe extends from the second seamless steel pipe to the outside of the second seamless steel pipe. The second sealing joint is sleeved on the exposed end of the fourth seamless steel pipe and connected to the first transmission pipe.

[0009] The length of the third seamless steel pipe ranges from 110 mm to 120 mm.

[0010] The adapter also includes a vacuum pumping device, and the second transmission tube is provided with a vacuum pumping interface, which is connected to the vacuum pumping device to perform vacuuming treatment on the vacuum chamber.

[0011] The second sealing joint has external threads on at least a portion of its outer wall.

[0012] The adapter also includes an insulation layer that wraps at least part of the first transmission tube to reduce cold loss.

[0013] The air pressure in the vacuum chamber is less than 1×10⁻⁶. -2 Pa.

[0014] The beneficial effects of this application are as follows: Unlike the prior art, in this application, a cavity is formed between the first transmission tube and the second transmission tube, and the first sealing joint and the second sealing joint seal the cavity. The cavity is set to be a vacuum. The two ends of the adapter are connected to the Dewar flask and the infusion tube, respectively. During the transmission of the cooling medium between the Dewar flask and the infusion tube, the thermal conductivity of the vacuum cavity is weak, thereby reducing the outward diffusion of the cold energy of the low-temperature medium in the first transmission tube and reducing the loss of cold energy. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0016] Figure 1 This is a schematic diagram of one embodiment of the adapter of this application;

[0017] Figure 2 yes Figure 1 A schematic diagram of the adapter and Dewar flask in an unsealed state;

[0018] Figure 3 yes Figure 1 A schematic diagram of the adapter and Dewar flask in a sealed state;

[0019] Figure 4 yes Figure 1 A schematic diagram of the structure when the adapter is connected to the Dewar bottle and infusion tubing. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] The adapter is used for the transfer between the Dewar bottle and the infusion tubing. Since the diameter of the Dewar bottle's equipment interface is different from that of the infusion tubing, the infusion tubing cannot be directly installed with the Dewar bottle. It is necessary to connect the Dewar bottle and the infusion tubing through the adapter. The adapter also has certain requirements for sealing and heat preservation. This application proposes the following technical solutions to improve the sealing performance of the adapter and reduce the cold loss of the low-temperature medium in the adapter.

[0022] See Figure 1 The adapter 100 includes a first transmission pipe 1, a second transmission pipe 2, a first sealing connector 3, a second sealing connector 4, and a locking element 5.

[0023] The first transmission tube 1 is hollow along the axial direction, and the second transmission tube 2 is sleeved around the first transmission tube 1, forming a vacuum cavity 6 between them. Specifically, the cavity formed between the first transmission tube 1 and the second transmission tube 2 is configured as a vacuum cavity 6. Vacuum is a poor conductor of heat. By configuring the vacuum cavity 6 between the first transmission tube 1 and the second transmission tube 2, the heat conduction between the low-temperature medium inside the first transmission tube 1 and the external environment can be reduced, thereby reducing the loss of cold energy of the low-temperature medium inside the first transmission tube 1 during transmission.

[0024] The first sealing connector 3 is connected to the first end of the first transmission tube 1 and the first end of the second transmission tube 2 to seal one end of the vacuum chamber 6. The first sealing connector 3 is hollow and communicates with the inside of the first transmission tube 1. The first sealing connector 3 is used to be inserted into the device interface 210 of the Dewar flask 200. The second sealing connector 4 is connected to the second end of the first transmission tube 1 and the second end of the second transmission tube 2 to seal the other end of the vacuum chamber 6. The second sealing connector 4 is hollow and communicates with the first transmission tube 1. The second sealing connector 4 is used to communicate with the infusion tube 300.

[0025] Specifically, the first sealing joint 3 and the second sealing joint 4 are located at the two ends of the vacuum chamber 6, respectively, for sealing the vacuum chamber 6. At the same time, the first sealing joint 3 can form a seal with the equipment interface 210 of the Dewar bottle 200, and the second sealing joint 4 is connected to the infusion tube 300, so that the cryogenic medium can flow between the first sealing joint 3, the first transmission tube 1 and the second sealing joint 4.

[0026] The locking element 5 is sleeved on the second transmission pipe 2 and is used to lock the device interface 210 of the Dewar 200 and the first sealing joint 3 when the first sealing joint 3 is inserted into the device interface 210 of the Dewar 200.

[0027] Specifically, with the locking member 5 in an unlocked state, the first sealing connector 3 is inserted into the device interface 210 of the Dewar flask 200. During the tightening of the locking member 5, the first sealing connector 3 continues to move toward the device interface 210 of the Dewar flask 200 until a seal is formed with the device interface 210 of the Dewar flask 200.

[0028] In this application, a cavity is formed between the first transmission tube 1 and the second transmission tube 2. The first sealing joint 3 and the second sealing joint 4 seal the cavity, and the cavity is set as a vacuum cavity. The two ends of the adapter 100 are respectively connected to the Dewar flask 200 and the infusion tube 300. During the transmission of the cooling medium between the Dewar flask 200 and the infusion tube 300, the thermal conductivity of the vacuum cavity 6 is weak, thereby reducing the outward diffusion of the cold energy of the low-temperature medium in the first transmission tube 1 and reducing the loss of cold energy.

[0029] See Figure 2 and Figure 3The adapter 100 also includes a pad 7, which is connected to the first sealing connector 3. The pad 7 is conical, and the device interface 210 has a first conical surface 211 inside. When the first sealing connector 3 is inserted into the device interface 210 of the Dewar flask 200, the outer peripheral surface of the pad 7 is sealed to the first conical surface 211 as the locking member 5 is tightened.

[0030] Specifically, the pad 7 is connected to the first sealing joint 3. The outer periphery of one end of the pad 7 is tapered, and the interior of the equipment interface 210 is tapered. During the rotation of the locking member 5, the adapter 100 is... Figure 2 The state in Figure 3 The state transition, that is, from the unsealed state of the first sealing joint 3 and the equipment interface 210 of the Dewar bottle 200 to the sealed state, the outer peripheral surface of the pad 7 gradually approaches the first conical surface 211 on the equipment interface 210, the outer peripheral surface of the pad 7 contacts the first conical surface 211, and a line seal is formed between the outer peripheral surface of the pad 7 and the first conical surface 211, thereby improving the sealing performance of the pad 7 and the equipment interface 210, and thus improving the sealing performance of the Dewar bottle 200 and the adapter 100.

[0031] Furthermore, in one embodiment, see [reference] Figure 3 The angle α of the cone shape on the outer periphery of the pad 7 is greater than the angle β of the cone shape on the first cone surface 211.

[0032] In one embodiment, the material of the pad 7 includes polytetrafluoroethylene.

[0033] Combination Figure 1 and Figure 4 The inner wall of the first transmission tube 1 is provided with a second conical surface 111. When the infusion tube 300 is inserted into the first transmission tube 1 through the second sealing joint 4, the end of the infusion tube 300 is sealed and connected to the second conical surface 111.

[0034] Specifically, the inner wall of the first transmission tube 1 is provided with a second conical surface 111. When the end of the infusion tube 300 contacts the inner wall of the first transmission tube 1, the end of the infusion tube 300 and the second conical surface 111 form a line seal, thereby improving the sealing performance of the first transmission tube 1 and the end of the infusion tube 300, and thus improving the sealing performance of the adapter 100 and the infusion tube 300.

[0035] Continue reading Figure 1The second transmission pipe 2 includes a first seamless steel pipe 21, a third sealing joint 22, a first reducer 23, and a second seamless steel pipe 24, which are coaxially arranged and connected in sequence. The diameter of the end of the first reducer 23 connected to the third sealing joint 22 is smaller than the diameter of the end of the first reducer 23 connected to the second seamless steel pipe 24. The outer circumferential surface of the third sealing joint 22 is provided with a groove 231 surrounding the third sealing joint 22. A sealing ring 8 is provided in the groove 231. The locking member 5 is sleeved around the third sealing joint 22. When the first sealing joint 3 is inserted into the device interface 210 of the Dewar flask 200, the device interface 210 of the Dewar flask 200 is inserted between the third sealing joint 22 and the locking member 5.

[0036] Specifically, the reducer is used to connect two pipes with different diameters. In this embodiment, the first reducer 23 is connected to the third sealing joint 22 and the second seamless steel pipe 24 at both ends. Since the diameter of the end of the third sealing joint 22 closest to the first reducer 23 is smaller than the diameter of the second seamless steel pipe 24, the first reducer 23 connects the third sealing joint 22 and the second seamless steel pipe 24, and the third sealing joint 22 connects the first sealing steel pipe and the first reducer 23, increasing the range of the vacuum cavity 6 outside the first transmission pipe 1. The outer circumferential surface of the third sealing joint 22 is provided with a groove 231 surrounding the third sealing joint 22. A sealing ring 8 is provided in the groove 231. When the adapter 100 needs to be connected to the Dewar flask 200, the equipment interface 210 of the Dewar flask 200 is inserted into the third sealing joint 22, and the equipment interface 210 is locked with the locking member 5. The sealing ring 8 in the groove 231 further enhances the sealing between the equipment interface 210 and the locking member 5.

[0037] Furthermore, the device interface 210 and the locking member 5 are connected by thread matching. For example, the device interface 210 has an external thread and the locking member 5 has an internal thread, and the device interface 210 and the locking member 5 are thread matched.

[0038] Continue reading Figure 1 The first transmission pipe 1 includes a third seamless steel pipe 11, a second reducer 12 and a fourth seamless steel pipe 13, which are coaxially arranged and connected in sequence. The diameter of the end of the second reducer 12 connected to the third seamless steel pipe 11 is smaller than the diameter of the end of the second reducer 12 connected to the fourth seamless steel pipe 13. The third seamless steel pipe 11 extends from the first seamless steel pipe 21 into the second seamless steel pipe 24. The second reducer 12 is disposed in the second seamless steel pipe 24. The fourth seamless steel pipe 13 extends from the second seamless steel pipe 24 to the outside of the second seamless steel pipe 24. The second sealing joint 4 is sleeved on the exposed end of the fourth seamless steel pipe 13 and connected to the first transmission pipe 1.

[0039] Specifically, the second transmission tube 2 is sleeved outside the first transmission tube 1, the diameter of the third seamless steel tube 11 is smaller than the diameter of the fourth seamless steel tube 13, so that the infusion tube 300 can be inserted into the fourth seamless steel tube 13, the second reducer 12 connects the third seamless steel tube 11 and the fourth seamless steel tube 13, so that the first transmission tube 1 can transport the low temperature medium, and the second sealing joint 4 is sleeved on the exposed end of the fourth seamless steel tube 13 and connected to the first transmission tube 1 to seal the vacuum chamber 6.

[0040] Furthermore, the end of the infusion tube 300 contacts the second reducer 12, and the end of the infusion tube 300 forms a line seal with the second conical surface 111 of the second reducer 12. The low-temperature medium flows from the third seamless steel tube 11 through the second reducer 12 and then into the infusion tube 300.

[0041] In one embodiment, the length of the third seamless steel pipe 11 ranges from 110 mm to 120 mm. Specifically, the third seamless steel pipe 11 serves as a thermal bridge, and setting its length between 110 mm and 120 mm, i.e., setting a relatively long thermal bridge, can reduce cold loss during the transmission of cooling medium through the third seamless steel pipe 11. The length of the third seamless steel pipe 11 can be 110 mm, 112 mm, 114 mm, 116 mm, 118 mm, or 120 mm. It should be noted that this application does not limit the specific length of the third seamless steel pipe 11.

[0042] In one embodiment, the adapter 100 further includes a vacuum pumping device (not shown), and the second transmission pipe 2 is provided with a vacuum pumping interface, which is connected to the vacuum pumping device to perform vacuuming treatment on the vacuum chamber 6.

[0043] Specifically, the second transmission pipe 2 is provided with an interface for vacuuming, which is connected to a vacuuming device, which performs vacuuming treatment on the vacuum chamber 6.

[0044] Furthermore, the interface is set on the second seamless steel pipe 24, and the interface is connected to the vacuum pumping equipment. The vacuum pumping equipment communicates with the vacuum chamber 6 through the interface to perform vacuuming treatment on the vacuum chamber 6.

[0045] In one embodiment, at least a portion of the outer wall of the second sealing joint 4 is provided with external threads. Specifically, the outer wall of the second sealing joint is provided with external threads, and when the infusion tube 300 is connected to the adapter 100, the external threads of the second sealing joint 4 and the internal threads on the infusion tube 300 form a thread match, thereby stably connecting the infusion tube 300 and the adapter 100.

[0046] In one embodiment, the adapter 100 further includes an insulation layer that wraps around at least a portion of the first transmission pipe 1 to reduce cold loss. Specifically, the insulation layer wraps around at least a portion of the outer side of the first transmission pipe 1, and the insulation layer can reduce heat conduction, thereby reducing cold loss during the transmission of the low-temperature medium.

[0047] Furthermore, the insulation layer includes at least one of polyester fiber, plant fiber, and aluminized film. The insulation layer includes one or more of polyester fiber layer, plant fiber layer, and aluminized film. For example, the insulation layer may be only a polyester fiber layer, a combination of polyester fiber layer and aluminized film, or a combination of plant fiber layer and aluminized film.

[0048] In one embodiment, the air pressure in the vacuum chamber 6 is less than 1 × 10⁻⁶. -2 Pa. Specifically, the gas pressure in vacuum chamber 6 is less than 1 × 10 Pa. -2 Pa reduces the rate at which the cryogenic medium conducts heat outward through vacuum chamber 6, thereby reducing the loss of cooling capacity. The pressure in vacuum chamber 6 can be 1×10⁻⁶. -3 Pa, 2×10 -3 Pa, 4×10 -3 Pa, 6×10 -3 Pa or 8×10 -3 Pa. It should be noted that this application does not impose specific limitations on the gas pressure value of vacuum chamber 6.

[0049] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. An adapter, characterized in that, include: The first transmission tube is hollow along the axial direction; The second transmission tube is sleeved around the first transmission tube and forms a vacuum cavity between them. The first sealing joint is connected to the first end of the first transmission tube and the first end of the second transmission tube to seal one end of the vacuum chamber. The first sealing joint is hollow and communicates with the inside of the first transmission tube. The first sealing joint is used to insert into the device interface of the Dewar flask. The second sealing joint is connected to the second end of the first transmission tube and the second end of the second transmission tube to seal the other end of the vacuum chamber. The second sealing joint is hollow and communicates with the first transmission tube. The second sealing joint is used to communicate with the infusion tube. A locking element, sleeved on the second transmission tube, is used to lock the device interface of the Dewar flask and the first sealing joint when the first sealing joint is inserted into the device interface of the Dewar flask.

2. The adapter according to claim 1, characterized in that, The adapter also includes: A pad is connected to the first sealing joint. The pad is conical, and the inside of the device interface is provided with a first conical surface. When the first sealing joint is inserted into the device interface of the Dewar bottle, the outer peripheral surface of the pad is sealed to the first conical surface as the locking member is tightened.

3. The adapter according to claim 1, characterized in that, The inner wall of the first transmission tube is provided with a second conical surface. When the infusion tube is inserted into the first transmission tube through the second sealing joint, the end of the infusion tube is sealed and connected to the second conical surface.

4. The adapter according to claim 1, characterized in that, The second transmission pipe includes a first seamless steel pipe, a third sealing joint, a first reducer, and a second seamless steel pipe that are coaxially arranged and connected in sequence. The diameter of the end where the first reducer connects to the third sealing joint is smaller than the diameter of the end where the first reducer connects to the second seamless steel pipe. The outer circumferential surface of the third sealing joint is provided with a groove surrounding the third sealing joint, and a sealing ring is provided in the groove. The locking member is sleeved around the third sealing joint. When the first sealing joint is inserted into the device interface of the Dewar bottle, the device interface of the Dewar bottle is inserted between the third sealing joint and the locking member.

5. The adapter according to claim 4, characterized in that, The first transmission tube includes a third seamless steel pipe, a second reducer and a fourth seamless steel pipe that are coaxially arranged and connected in sequence. The diameter of the end of the second reducer that is connected to the third seamless steel pipe is smaller than the diameter of the end of the second reducer that is connected to the fourth seamless steel pipe. The third seamless steel pipe extends from the first seamless steel pipe into the second seamless steel pipe, the second reducer is disposed in the second seamless steel pipe, and the fourth seamless steel pipe extends from the second seamless steel pipe to the outside of the second seamless steel pipe; The second sealing joint is fitted onto the exposed end of the fourth seamless steel pipe and connected to the first transmission pipe.

6. The adapter according to claim 5, characterized in that, The length of the third seamless steel pipe ranges from 110 mm to 120 mm.

7. The adapter according to claim 1, characterized in that, The adapter also includes a vacuum pumping device, and the second transmission tube is provided with a vacuum pumping interface, which is connected to the vacuum pumping device to perform vacuuming treatment on the vacuum chamber.

8. The adapter according to claim 1, characterized in that, At least a portion of the outer wall of the second sealing joint is provided with external threads.

9. The adapter according to claim 1, characterized in that, The adapter also includes an insulation layer that wraps at least part of the first transmission tube to reduce cold loss.

10. The adapter according to claim 1, characterized in that, The air pressure in the vacuum chamber is less than 1×10⁻⁶. -2 Pa.

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